Machine for removing surplus material from boots and shoes



' Q I a a 5 June 28, 1927. R. P. FRYE 16338 5 I MACHINE FOR REMOVING SURPLUS MATERIAL FRQI BOOTS AND SHOES Filed Feb. 21, 1924 Patented June 28, 1927.

UNITED STATES 1,633,855 PATENT OFFICE.

ROBERT P. FRYE, OF MARLBORO, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MA- CHINERY CORPORATION, OF- IATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

MACHINE FOR REMOVING SURPLUS MATERIAL FROM BOOTS AND SHOES.

Application filed February 21, 1924. Serial No. 694,265. a

This invention relates to machines for removing surplus material from boots or shoes. The invention is illustrated as embodied in a machine designed to remove from the toe portions of unfinished boots or shoes the surplus material which results from the pulling-over and lasting operations; It is to be understood, however, that machines constructed in accordance with the present invention may be employed for removing surplus material from other portions of boots and shoes. i

The toe portion of a shoe upper usually comprises the leather of the upper, the lining, and a toe stiffener or toe box. In modern commercial practice, the toe box, which is inserted between the upper and lining before the toe lasting operation, commonly consists of a layer or layers of felt or woven fabric impregnated with a mineral wax, such as asphaltum, or a compound containing such wax Such a toe box is stiff and hard at ordinary temperatures but when moderately hot, that is, at a temperature which isnot injurious to leather. it is plastic and readily conformable by the lasting machine to the shape of the toe. hen the margins of the upper and hot toe box are forced inwardly over the bottom of the insole, they are crimped and bunched and some of the toe box wax or gum is apt to ooze out and cling to the bunched stock. In view of the foregoing conditions it is an object of this invention to provide an improved machine especially adapted for removing surplus crimped and bunched upper materials from around the toes of boots and shoes in the pulling-over and lasting operations which machine will be so constructed as to obviate any tendency of the more or less sticky materials removed or of the wax itself to cling to the material removing device, and which will at the same time adequately dispose of the waste material removed.

To this end the machine illustrated as embodying the invention in a preferred form comprises a hollow, rotary shell provided with projections or teeth arranged inlines parallel to the axis of the shell and having, 50 i as illustrated, square, convex scraping edges,

said edges lying in radial planes of the shell.

Each of the illustrated projections is substantially a quarter section ,of a hollow sphere, one edge of which is attached to or the material removed by the projections. As

illustrated, no dimension of the opening is substantially less than the length of the scraping edge of the adjacent projection.

The material which is removed by the edges of the projections, and which passes freely through the openings adjacent to the projections, consists of particles of leather and fabriomixed with toe'box wax. This fibrous and cementitious material is forced through the openings by subsequently removed material in the form of lumps which tend to adhere to the inner surface of the shell not only by reason of their more or less plastic and sticky character but also because of the centrifugal force produced by the rotating shell.

A further feature of the invention consists in mechanical means between which and the shell there is relative movement for detaching the lumps of material from the interior surface of the shell. As shown, a scraper having an edge located adjacent to the inner surface of the shell is mounted upon a shaft coaxial with'thc shell. The said shaft may be stationary or may be rotated in a direction reverse to the direction of rotation of the shell. One end of the shell is preferably open and the scraper may have its edge next to the shell inclined to the direction of the axis .of the shell so as to cause the material removed from the shell to be transferred toward its open end and to be discharged therefrom.

These and other features of the invention will appear more fully from the following detailed description when read in connection with the accompanying drawing and will be pointed out in the appended claims. In the drawing,

1 is a side elevation of a machine partly broken away embodying the present invention, and .Fig. 2 is a perspective view of the shell partly broken away to show the scraper.

In the drawin the vnumeral 2 indicates a standardupon w iich is a bearing 4 through which passes a shaft 6. Upon the shaft 6 is a sleeve 8 having at one end a flange 10 and at the other a pulley 12 to which power is applied by a belt 14. A cylindrical shell 16 has an open outer end and a wall 18 at its inner end which wall has an opening to receive the shaft 6, said wall being secured by screws 20 to the flange 10. A collar 22 on the shaft 6 entersthe opening in the end wall of the shell and abuts against the flange 10 to prevent outward endwise movement of the sleeve 8 and shell 16.

The portion of the shaft 6 which is inside the shell has secured to it a collar 24Lbya screw 25. The collar is provided with an angularly arranged slot 26 in which is secured one edge of a scraper plate 28. The outer edge of the plate 28 lies in close proximity to the inner surface of the shell 16 and acts as a scraper to remove material from the inner surface of the shells Theouter edge of the plate 28 is arranged at an inclination to the axis of rotation of the shell 16, its inner end being directed backwardly and its outer end forwardly with respect to the direction of rotation of the shell, so that it acts to propel the removed materialtoward the open end of the shell.

The shaft 6 maybe extended beyond the bearing 4 and provided with a pulley 30 arranged to be driven in a direction opposite to the direction of rotation of the shell 16 by a belt 32. Tnis arrangement not only increases the scraping effect of the plate 28 but also enhances its action as a fan to create a current of air inwardly through openings 34 in the shell and out through the open end of the shell. If desired, the pulley 30 may be dispensed with and a set screw 36 tightened to hold the shaft 6 in the bearing 2 and prevent rotation of the scraper plate The shell 16 is provided. with parallel rows of openings 34 and at one side of each opening, which side will be the following side with respect to the direction in which the shell. is to be rotated, there is an outward projection 38 which is substantially quarterspherical in form. At one edge the projection is attached to or formed integral with the shell 16, its other edge 40 forming an arched or outwardly convex scraping edge which is a continuation of the edge of the opening 34.- of the shell. Each edge is strongly supported by the arched material of the projection hack of it and may be sharpened by grinding if desired. Since, as illustrated, the edge faces of the projections are square, that is, they lie in radial planes of the shell, the grinding operation is greatly facilitated since it is done on the flat edge faces and not on the covex faces of the projections. The openings 34 are shown (Fig. 1) as rectangular; their shape, however, 1s

immaterial except. that they should be sufficiently large to allow the material removed by the scraping edges to pass into the shell. Adequate openings are provided if, as illustrated, no dimension of the openings is substantially less than the length of the adjacent scraping edge.

In use the shell 16 is rapidly rotated by power, the scraper 28 being either held stationary or rotated in the reverse: direction. The operator presents the bottom of the toe portion of a lasted shoe,before the outsole is attached, to the shell, the projections of which quickly remove the surplus material, consisting usually of fibrous material produced by disintegration of the leather, lining and toe box, together with cementitious material which clings. to the shoe and with which the fibrous material is more or less impregnated. The shoe is moved axially of the shell to cause all portions of the projeeting surplus material to be subjected to the action of the teeth. The removed material passes readily through the large openings in front of the projections and immediately engages, or is engaged by, the scraper 28 by which it is knocked loose from the shell, if it tends to adhere, and, by reason of the inclination of the scraper to the axis of the shell, is moved toward the open end of the shell and discharged therefrom.

Having thus described my invention, what I claim as new and desire to secureby Letters Patent of the United States is:

1. An abrading tool for removing surplus fibrous and cementitious material from the bottoms of boots and shoes prior to the attachu'ient of the outsoles comprising a hollow, cylindrical shell having projections thereon arranged in lines parallel to the axis of the shell, each projection being substantially quarter-spherical in form and having a square scraping edge lying in a radial plane of the shell, the shell having an opening adjacent to each scraping edge no dimension of which is substantially less than the length of the edge so that lumps of sticky I material detached from the shoe bottom by said edge will. find free passage' into' the interior of the shell.

2. A machine for removing surplus material from boots or shoes or parts thereof, comprising a rotary, perforated, toothed shell. and a scraper plate within the shell arranged to loosen. material adhering to the inner surface of the shell.

3. A machine for removing surplus material from boots or shoes or parts thereof, comprising a hollow, cylindrical shell having perforations therein and stock-removing projections formed on the shell, means for rotating the shell about its axis, and a scraper supportedat the axis of the shell and having an edge adjacent tothe interior surface of the shell. I

4. A machine for removing surplus material from boots and shoes or parts thereof,

comprising a hollow, cylindrical shell hav mg perforations therein and stock-removing pro ections formed on the shell, means for,

rotating the shell about its axis, and a scraper supported at the axis of the shell and having an edge adjacent to the interior surface of the shell and at an angle to the axis of the shell'to cause material removed from the interior surface of the shell by the scraper shell.

5. A machine for removing surplus material from the bottoms of boots or shoes comprising, in combination, a shell having stock-removing projections and perforations adjacent to the projections to admit the removed material to the interior of the shell, means for rotating the shell, and means adjacent to the interior surface of the shell, and between which and the shell there is relative movement, for loosening removed material which tends to cling to the interior of the shell.

6. A machine for removing from the bottoms of boots or shoes the excess of overlasted material at the toe portion thereof, including upper material and toe box wax, comprising, in combination, a rotating shell having stock-removing projections and perforations for admitting the removed material to the interior of the shell, and a scraper having an edge lying adjacent to the inner surface of the shell to remove the upper material and wax which pass through the perforations.

T. A machine for removing surplus ma terial from boots or shoes or parts thereof, comprising a supporting shaft, a rotary sleeve on the shaft, a cylindrical shell having an open end and a wall at its opposite end secured to said sleeve, teeth on the shell adjacent to perforations in the shell,'and a blade mounted on the shaft and having an edge adjacent to the inner surface of the cylindrical shell to loosen material clinging to the interior of the shell.

8. A machine for removing surplus material from the bottoms of boots and shoes,

to be transferred axially of the comprising a shaft, a sleeve on the shaft, means for rotating the sleeve, a hollow shell secured to said sleeve and having projections and perforations and an open end, a scraper blade having one edge secured to said shaft and the opposite edge adjacent to the interior surface of the shell and inclined to the axis of the shell, and means for rotating the shaft and scraper to cause transfer of V to. said shaft and its opposite edge adjacent to the interior of the shell and inclined to the axis of the shaft, and means to rotate the blade to cause it to remove material from the interior of the shell and create a current of air inwardly through the perforations of the shell and outwardly through the open end of the shell.

10. A machine for removing surplus material from the bottoms of boots or shoes, comprising a hollow shell having projections and perforations, a scraper within the shell for removing material clinging to the interior surface thereof, means for rotating the shell in one direction, and means for rotating the scraper in the opposite direction.

11. A machine for removing surplus material from the bottoms of boots or shoes, comprising a shaft, a sleeve on the shaft, means for rotating the sleeve, a hollow cylindrical shell secured to said sleeve and having projections and perforations, a scraper secured to said shaft and arranged to remove material from the interior of the shell, and means for rotating the shaft and scraper in a direction opposite to the direction of rotation of the sleeve and shell.

In testimony whereof I have signed my name to this specification.

ROBERT P. FRYE. 

